diff --git a/pyproject.toml b/pyproject.toml
index 1e1ece5..989bbce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,4 +6,5 @@ profile = "black"
 
 [tool.pytest.ini_options]
 minversion = "6.0"
-addopts = --doctest-modules
+addopts = "--doctest-modules"
+